Question

Cu-> CuS-> Cu(NO3)2-> CuCO3-> CuO

Answer 1

Cu + S (t)= CuS

CuS + 2AgNO3 = Cu(NO3)2 + Ag2S

Cu(NO3)2 + Na2CO3 = CuCO3 + 2NaNO3

CuCO3 (t)= CuO + CO2

Answer 2

It seems like you have provided a sequence of chemical reactions involving copper (Cu) and its compounds. Let's go through each step of the reaction sequence:

1. Cu → CuS: In this step, copper (Cu) reacts with sulfur (S) to form copper sulfide (CuS), which is a compound of copper and sulfur.

2. CuS → Cu(NO3)2: In this step, copper sulfide (CuS) reacts with nitric acid (HNO3) to form copper nitrate (Cu(NO3)2) and release sulfur dioxide (SO2) gas. The reaction involves the dissolution of CuS in nitric acid.

3. Cu(NO3)2 → CuCO3: In this step, copper nitrate (Cu(NO3)2) is reacted with sodium carbonate (Na2CO3) or another carbonate source. This reaction forms copper carbonate (CuCO3) as a solid precipitate and releases sodium nitrate (NaNO3) as a soluble salt.

4. CuCO3 → CuO: In the final step, copper carbonate (CuCO3) is heated or thermally decomposed to produce copper oxide (CuO) and release carbon dioxide (CO2) gas.

The overall sequence can be summarized as follows: Cu → CuS → Cu(NO3)2 → CuCO3 → CuO + CO2

Each step involves different chemical reactions and conditions, so it's essential to follow appropriate safety measures and perform these reactions with the necessary knowledge and expertise. Always handle chemicals and reactions with care and in a controlled environment.